Some characteristics of patients with an LBHD1 gene partial deletion are intellectual disability and abnormality of the foot and the hand, while patients with a partial duplication of the LBHD1 gene show abnormal fear/anxiety-related behavior, asthma, delayed fine motor development, delayed speech and language development, epicanthus, global developmental delay, hypertelorism, long philtrum, microtia, and thin upper lip vermilion (https://decipher.sanger.ac.uk/search?q=LBHD1#consented-patients/results). This evidence concerns the gene LBHD1 and Global developmental delay.